Fixed ratio metering system



FIG. 1 is a front isometric view of the fixed ratio metering system;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a back view thereof. 

The ornamental design for a fixed ratio metering system, as shown and described. 